Which daytime soap opera debuted on NBC in 1965 and is known for its hourglass opening?

In 'Dallas', what is the name of the Ewing family ranch? In 'Dynasty', which actress played Alexis Colby? In 'Knots Landing', from which show did the series spin off? Which prime-time soap opera was a spin-off of 'Beverly Hills, 90210'? Which soap opera is set in the fictional town of Port Charles? Which soap opera is set in the fictional town of Genoa City? Which late-night show did Conan O'Brien host from 1993 to 2009 on NBC? Which comedian became host of 'The Tonight Show' in 2014?